You can thank Brian's numb fingers and wrists for this one: Due to popular demand, you can now add developer credits to any entry! To do so, just go to the entry you want to add developers for and click Contribute on the left-hand side of the screen.

As with everything you contribute, you get contribution points for adding developers. Each developer added is 1/4th of a point, but you get 2 points right off the bat for contributing developers. So, if you added 8 developers to an entry, you'd get 4 points: 2 for being willing to contribute developers, and 1/4th of a point for each developer.

We've retroactively granted more contribution points to people who have been willing to send them in, so check your contribution rating--it might have jumped up.